Siemens WZU-485E-MOD Betriebsanleitung - Seite 4
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8.
Modbus description
Unless otherwise indicated, all values are in binary format. 2-byte values (signed), and 4-byte values (unsigned), are used.
Note: The module only transmits absolute values of the meter's parameters.
Data format of a complete meter readout
Register
Data
Number
Address
0x40002
1
Tf
0x40003
2
Tr
0x40004
3
dT
0x40005
4
Q
0x40007
6
P
0x40009
8
Ecold
0x4000B
10
Time
0x4000D
12
F
0x4000E
13
Header
0x4000F
14
E
0x40011
16
V
0x40013
18
N
0x40015
20
EM
0x40017
22
VM
0x40019
24
A1
0x4001B
26
A2
0x4001D
28
I1
0x4001F
30
I2
0x40021
32
N1
0x40023
34
N2
0x40025
36
0x40027
38
0x40029
40
Table1: Available Modbus registers
Data reading
The module only responds to data requests with function code 03 (read holding registers).
Meter values are available at data addresses 1 – 40.
Any data address from the range can be chosen as a starting point.
The module does not check the completeness of the variables it sends.
After receiving a data request, the module reads new data from the meter within 5 seconds.
After a data request with the broadcast address "0", the module reads new data from the meter, but sends no message.
The module does not return exception responses to invalid data requests.
WZU-485E-MOD
Value
Name Value
Temperature hot side
Temperature cold side
Temperature difference
Actual flow
Actual power
Accumulated cold energy (eq. tariff register 1)
Date and time
Info code F
Module info
Accumulated energy (Standard register)
Accumulated volume
Serial number
Monthly value - Energy on set day
Monthly value - Volume on set day
Pulse input 1 accumulated (not used)
Pulse input 2 accumulated (not used)
Pulse value input 1 (not used)
Pulse value input 2 (not used)
Serial number A1
Serial number A2
Tariff register 1
Tariff register 2
Tariff register 3
No. of
Bytes
2
2
2
4
4
4
4
2
2
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Subject to change without prior notice
Description
0.01 °C
0.01 °C
0.01 K
0.001 m³/h
0.01 kW
format and unit according to header
M-Bus type F
Meter Error (see table 2)
Units and formats (see table 3)
format and unit according to header
format according to header m
format and unit according to header
format according to header m
Not used
Not used
Not used
Not used
format and unit according to header
format and unit according to header
format and unit according to header
3
3
4